f(1,1,1,1)=5意思是1,1,1,1用加減乘除算不出5。問題是怎樣證明算不出5？

來源: 皆兄弟也於 2010-07-19 17:39:23 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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